The document summarizes Cliffano Subagio's experience over the past two years working on open source projects related to Adobe Experience Manager (AEM). It discusses the architecture of AEM OpenCloud, its use of multiple operating systems and cloud platforms, and reasons for taking an open source approach. It also provides statistics on contributions to the projects and lessons learned around testing, deployment pipelines, and using multiple programming languages. The document encourages joining the open source community to help with its future growth and sustainability.